Home > Developer > Web Develop

Comparison of Jquery.extend () and JQuery.fn.extend ()

Source: Internet
Author: User
Developer on Alibaba Coud: Build your first app with APIs, SDKs, and tutorials on the Alibaba Cloud. Read more ＞

      • Same point
      • Different points
        • Jqueryextend
        • Jqueryfnextend
      • code example

Same point

Both are used to extend jquery and to add methods to jquery, which are often used in the development of jquery-related plugins.

Different points jquery.extend ()

Adding a class method to the JQuery class itself is a static method;

Calls to the added method can only be invoked by the jquery itself, and the jquery instance object cannot invoke the newly added method. For example, the show and hide methods are added, and are called by: Jquery.show () and Jquery.hide ().

JQuery.fn.extend ()

Look at the source code of jquery to see: Jquery.fn=jquery.prototype, it is not difficult to find that Jquery.fn is actually the prototype of jquery. Then calling JQuery.fn.extend () is actually the way to extend the Jquery.prototype object. Since all the member methods in the jquery prototype are inherited by all jquery instance objects, there is a way to add the jquery instance object as long as it is.

Unlike Jquery.extend (), JQuery.fn.extend () is adding a method to a jquery prototype, which is a member method of the jquery instance object.

The invocation has also changed, and all jquery instance objects can be called without invoking the added method via jquery itself.

code example 
<! DOCTYPE html><html><head lang="en">    <meta charset="UTF-8">    <title>Jquery.extend ()</title></head><body><div id="Sample">Extend</div></body><script src="Jquery-1.11.0.js"></script><script>$ (document). Ready ( function($){Jquery.extend ({show: function(){Alert"Show message!"); }, Hide: function () {Alert"Hide message!");        }        });        Jquery.hide (); Jquery.show ();//Use jquery itself to invoke the newly added method}) JQuery ( function($){JQuery.fn.extend ({show: function(){Alert"Show message!"); }, Hide: function () {Alert"Hide message!");        }        }); $("#sample"). Show (); $("#sample"). Hide ();//Using a jquery instance object to invoke the newly added method})</script></html>

Comparison of Jquery.extend () and JQuery.fn.extend ()

This article is an English version of an article which is originally in the Chinese language on aliyun.com and is provided for information purposes only. This website makes no representation or warranty of any kind, either expressed or implied, as to the accuracy, completeness ownership or reliability of the article or any translations thereof. If you have any concerns or complaints relating to the article, please send an email, providing a detailed description of the concern or complaint, to info-contact@alibabacloud.com. A staff member will contact you within 5 working days. Once verified, infringing content will be removed immediately.

Contact Us

The content source of this page is from Internet, which doesn't represent Alibaba Cloud's opinion; products and services mentioned on that page don't have any relationship with Alibaba Cloud. If the content of the page makes you feel confusing, please write us an email, we will handle the problem within 5 days after receiving your email.

If you find any instances of plagiarism from the community, please send an email to: info-contact@alibabacloud.com and provide relevant evidence. A staff member will contact you within 5 working days.

A Free Trial That Lets You Build Big!

Start building with 50+ products and up to 12 months usage for Elastic Compute Service

Get Started for Free

  • Sales Support

    1 on 1 presale consultation

    Chat Contact Sales

  • After-Sales Support

    24/7 Technical Support 6 Free Tickets per Quarter Faster Response

    Open a Ticket

  • Alibaba Cloud offers highly flexible support services tailored to meet your exact needs.

    Learn More